Sealed Enclosure for OTA Temperature Testing
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Solution Overview
Problem
Current over-the-air test systems for measuring radiation performance as a function of temperature are inefficient due to leakage of ambient conditions, instability in test atmospheres, and inability to perform three-dimensional measurements, which affects the validity of results and fails to account for the impact on the entire device, including the radio frequency circuit.
Innovation Solution
An over-the-air test system comprising a sealed enclosure with an atmosphere conditioning system that adapts temperature and pressure within the enclosure, ensuring the entire device under test, including the radio frequency circuit, is exposed to controlled ambient conditions, allowing for accurate and stable measurements across one, two, or three dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a static chamber is positioned around the antenna unit to provide a certain atmosphere, then the antenna unit is covered for testing, but the chamber results in leakage of the atmosphere and is inefficient
Solution Approach 1:
The patent merges the chamber and device into a single integrated unit where the device is positioned inside the chamber such that the chamber completely covers the device. This integration eliminates the leakage problem by ensuring the atmosphere is contained within the chamber, while the device remains accessible for testing purposes.
Solution Approach 2:
The chamber is designed to serve multiple functions: it provides the testing atmosphere, contains the device during testing, and allows for complete coverage of the device including the antenna unit and radio frequency circuit. This multi-functionality resolves the contradiction by making the chamber both a containment structure and a testing platform.
2Stability of the object's composition
If the device is firmly connected to the chamber for adapting the atmosphere, then the atmosphere can be controlled, but three-dimensional OTA measurements cannot be performed
Solution Approach 1:
The patent segments the device into separate components (antenna unit and radio frequency circuit) that can be independently positioned and tested. The antenna unit can be rotated and moved to different positions while the radio frequency circuit remains in the chamber, allowing three-dimensional measurements to be performed without compromising atmosphere stability.
Solution Approach 2:
The patent introduces dynamic positioning capabilities for the antenna unit, allowing it to be rotated and moved within the chamber during testing. This dynamic arrangement enables three-dimensional OTA measurements while the chamber maintains stable atmosphere control through its sealed structure.
3Measurement precision
If only the antenna unit is encompassed by the chamber, then the antenna can be tested, but the influence of the radio frequency circuit is not tested
Solution Approach 1:
The patent merges the testing of the antenna unit and radio frequency circuit into a single integrated test setup. The chamber is designed to completely cover both components, allowing the atmosphere to be controlled and measured for the entire device, including the radio frequency circuit that processes signals transmitted and received by the antenna unit.
Solution Approach 2:
The chamber is designed to serve as a universal testing environment that can accommodate and test both the antenna unit and radio frequency circuit simultaneously. This multi-functional design allows for comprehensive testing of the entire device under test, not just individual components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures high validity and efficiency in measuring temperature-dependent performance by maintaining a sealed environment, allowing for precise exposure of the device to varying conditions, thereby improving the accuracy and applicability of over-the-air measurements.
Implementation Method 1
an atmosphere conditioning system that is configured to adapt the atmosphere within the internal space
Implementation Method 2
the enclosure comprises at least one sealable opening via which the internal space is connectable with the atmosphere conditioning system
Data Source
AI summary
An over-the-air test system for measuring the radiation performance as a function of temperature of a device under test is described, wherein the device under test has at least one antenna unit and at least one radio frequency circuit. The over-the-air test system comprises a measurement antenna unit, a measurement unit for at least one of signal generation and signal analysis, an enclosure that provides an internal space for accommodating the device under test for testing purposes in a sealed manner, and an atmosphere conditioning system that is configured to adapt the atmosphere within the internal space. The enclosure comprises at least one sealable opening via which the internal space is connectable with the atmosphere conditioning system to adapt the atmosphere within the internal space for the testing. Further, a method for measuring the over-the-air performance of a device under test is described.